QUESTION 6 Exhibit 2-2 The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hours 0 - 9 Frequency 10 - 19 20 20 - 29 80 30 - 39 200 100 Refer to Exhibit 2-2. The number of students who work 19 hours or less is O 80 O 100 O 200 O 400